Active: Akali moves through the shadows to quickly deal magic damage to the target and appear next to it. Akali gains an Essence of Shadow charge once every few seconds up to a total of 3, affected by cooldown reduction. The time to gain a charge doesnt count when at maximum charges. Additionally, Akali gains an Essence of Shadow for a kill or an assist.
Cost: 1 Essence of Shadow
Range: 800
Cooldown: 2/1.5/1 seconds
Essence of Shadow Recharge Time: 35 / 25 / 15 seconds
Magic Damage: 100/175/250 (+0.5 per ability power)

+400 Health
+100 Ability Power
UNIQUE Passive: Damaging spells and abilities apply a Movement Speed reduction to enemies based on the spell type:
Single Target: 40% reduction for 1.5 seconds.
Area of Effect: 40% reduction for 1 seconds.
Damage over Time or Multi-hit: 20% reduction for 1 seconds.
Summoned Minions: 20% reduction for 1 seconds.
(If a spell fits in more than one category, it uses the weakest slow value.)

Endgame items

Rabadon's Deathcap

+120 Ability Power
Unique: +35% ability power

Hextech Gunblade

+40 Attack Damage
+80 Ability Power
UNIQUE Passive: Heal for 15% of damage dealt. This is 33% as effective for Area of Effect damage.
UNIQUE Active: Deals 150 (+40% of Ability Power) magic damage and slows the target champion's Movement Speed by 40% for 2 seconds (30 second cooldown).

Optional Items

Zhonya's Hourglass

+100 Ability Power
+45 Armor
UNIQUE Active - Stasis: Champion becomes invulnerable and untargetable for 2.5 seconds, but is unable to move, attack, cast spells, or use items during this time (90 second cooldown).

+400 Health
+100 Ability Power
UNIQUE Passive: Damaging spells and abilities apply a Movement Speed reduction to enemies based on the spell type:
Single Target: 40% reduction for 1.5 seconds.
Area of Effect: 40% reduction for 1 seconds.
Damage over Time or Multi-hit: 20% reduction for 1 seconds.
Summoned Minions: 20% reduction for 1 seconds.
(If a spell fits in more than one category, it uses the weakest slow value.)

Hextech Gunblade

+40 Attack Damage
+80 Ability Power
UNIQUE Passive: Heal for 15% of damage dealt. This is 33% as effective for Area of Effect damage.
UNIQUE Active: Deals 150 (+40% of Ability Power) magic damage and slows the target champion's Movement Speed by 40% for 2 seconds (30 second cooldown).